3 more suspects taken into custody in Boston bombing case

FILE - In this Saturday, April 27, 2013 file photo, visitors pause at a makeshift memorial in Copley Square for victims of the Boston Marathon bombings, in Boston. Rep. Michael McCaul, the chairman of the House Homeland Security Committee, says he believes the Boston Marathon bombing suspects had some training in carrying out their attack. McCaul is citing the type of device used in the attack, the shrapnel-packed pressure-cooker bombs, and the weapons' sophistication as signs of training. (AP Photo/Robert F. Bukaty, File)